explanatory comment

examples/src/UdpExamples/MulticastUdpReceiver.java

@@ -73,7 +73,7 @@ public class MulticastUdpReceiver
             StringBuilder firstCharacters = new StringBuilder();
             char nextChar;
 
-            while (true) {
+            while (true) { // true is always true, so this is an infinite loop that continues until interrupted
                 multicastSocket.receive(packet);
                 count++;